A GEM readout with radial zigzag strips and linear charge-sharing response

Understand

We study the position sensitivity of radial zigzag strips intended to read out large GEM detectors for tracking at future experiments.

• Zigzag strips can cover a readout area with fewer strips than regular straight strips while maintaining good spatial resolution.
• Consequently, they can reduce the number of required electronic channels and related cost for large-area GEM detector systems.
• A non-linear relation between incident particle position and hit position measured from charge sharing among zigzag strips was observed in a previous study.